TWI745175B - Driving device, camera module and electronic device - Google Patents

Abstract

A driving device has a central axis and includes a cover, a base, at least one displaceable platform and at least one moving auxiliary member. The cover surrounds the central axis and is fixed to the base. The cover and the base form a containing space. The displaceable platform is disposed in the containing space, and includes at least one lateral rolling member. The lateral rolling member is for moving the displaceable platform relative to the cover and the base along at least one direction perpendicular to the central axis. The moving auxiliary member abuts against the cover and the displaceable platform. The moving auxiliary member and the lateral rolling member are disposed on two relative sides of the displaceable platform along the central axis, respectively. Therefore, it is favorable for providing proper preload on the displaceable platform by the arrangement of the moving auxiliary member and the cover so as to avoid the loose of the displaceable platform and the lateral rolling member and obtain the compactness.

Description

Drive device, camera module and electronic device

The present disclosure relates to a driving device and a camera module, and in particular to a driving device and a camera module applied to a portable electronic device.

In recent years, portable electronic devices have developed rapidly, such as smart electronic devices, tablet computers, etc., which have flooded the lives of modern people, and the camera modules and their driving devices mounted on the portable electronic devices have also flourished. develop. However, with the increasing advancement of technology, users have higher and higher requirements for the quality of the driving device. Therefore, the development of a driving device that stabilizes the moving direction of the imaging lens and achieves miniaturization has become an important and urgent problem in the industry.

Drive device, camera module and electronic device provided by the present disclosure , Through the design of the translational auxiliary element and the housing, a moderate preload of the translational stage can be provided, so that the translational stage and the horizontal rolling element are not easily loosened, and the effect of miniaturization can be achieved.

According to one embodiment of the present disclosure, a driving device is provided, which has a central axis, and includes a housing, a base, at least one translational stage, and at least one translational auxiliary element. The shell surrounds the central axis and is fixed to the base, and the shell and the base form an accommodating space. The translatable stage is arranged in the accommodating space and includes at least one lateral rolling element, wherein the lateral rolling element is used to move the translatable stage relative to the housing and the base along at least one direction perpendicular to the central axis. The translational auxiliary element abuts against the housing and the translational carrier. The translational auxiliary element and the lateral rolling element are respectively arranged opposite to the two sides of the translational stage along the central axis.

According to the driving device of the embodiment described in the preceding paragraph, the housing can provide a positive force to act on the translational stage and the lateral rolling element through the translational auxiliary element, and the direction of application of the positive force is perpendicular to the direction of movement of the translational stage .

According to the driving device of the embodiment described in the preceding paragraph, the housing may include an opening portion, a fixing portion, and a receiving portion. The opening part surrounds the central axis and forms an opening. The fixing part extends from the opening part to the base and is fixed to the base. The receiving part is arranged between the opening part and the fixing part, and is used for receiving the translation auxiliary element.

According to the driving device of the embodiment described in the preceding paragraph, the receiving portion may include a two-stage surface, the two-stage surfaces are parallel to each other and receive at least two translational auxiliary elements.

According to the driving device of the embodiment described in the preceding paragraph, the receiving portion receives the at least one translation auxiliary element in a point contact manner.

According to the driving device of the embodiment described in the preceding paragraph, it may further include at least one groove, wherein the groove is disposed in at least one of the translatable stage and the housing, and the translation auxiliary element is disposed in the groove.

According to the driving device of the embodiment described in the preceding paragraph, the translation auxiliary element may be a sphere.

According to the driving device of the embodiment described in the preceding paragraph, the translation auxiliary element may be a cylinder.

According to the driving device of the embodiment described in the preceding paragraph, the translational auxiliary element may be symmetrically arranged along the central axis.

According to the driving device of the embodiment described in the previous paragraph, it may further include a carrier disposed in the accommodating space. The carrier may include at least one axial rolling element, wherein the axial rolling element is used to move the carrier in a direction parallel to the central axis relative to the translatable stage.

According to the driving device of the embodiment described in the preceding paragraph, the housing and the axial rolling element may overlap at least partly along the direction parallel to the central axis.

According to the driving device of the embodiment described in the preceding paragraph, the axial rolling element can be closer to the central axis than the translation auxiliary element.

According to the driving device of the embodiment described in the preceding paragraph, the housing may be composed of at least one of a plastic material and a metal material.

According to the driving device of the embodiment described in the preceding paragraph, the housing may include at least two injection marks.

According to the driving device of the embodiment described in the preceding paragraph, it may further include at least one driving magnet and at least one driving coil. The driving magnet is arranged on one of the carrier and the translatable stage, and the driving coil is fixed to the housing and corresponding to the driving magnet.

An embodiment of the present disclosure provides a camera module, which includes a driving device according to the embodiment described in the preceding paragraph, an imaging lens group, and an electronic photosensitive element. The imaging lens group is arranged in the driving device, and the driving device is used for moving the imaging lens group in a direction perpendicular to the central axis and a direction parallel to the central axis. The electronic photosensitive element is used to convert a light passing through the imaging lens group into an image signal.

An embodiment of the present disclosure provides an electronic device including at least one camera module according to the embodiment described in the preceding paragraph.

One embodiment of the present disclosure provides a camera module, which includes a housing, a base, an imaging lens, and at least one lateral rolling element. The shell is fixed to the base and forms an accommodating space. The imaging lens is arranged in the accommodating space and has an optical axis. The lateral rolling element is arranged between the imaging lens and the base, and is used for moving the imaging lens in at least one direction perpendicular to the optical axis relative to the housing and the base. The housing provides a positive force to act on the lateral rolling element, and the direction of the positive force is parallel to the optical axis of the imaging lens.

The present disclosure provides a driving device, which has a central axis, and includes a housing, a base, at least one translational stage, and at least one translational auxiliary element. The shell surrounds the central axis and is fixed to the base. The shell and the base form an accommodating space. The translatable stage is arranged in the accommodating space and includes at least one lateral rolling element, wherein the lateral rolling element is used to move the translatable stage relative to the housing and the base along at least one direction perpendicular to the central axis. The translational auxiliary element abuts against the housing and the translational carrier, wherein the translational auxiliary element and the lateral rolling element are respectively arranged opposite to the two sides of the translational carrier along the central axis. Through the design of the translational auxiliary element and the housing, a moderate preload of the translational stage is provided, so that the lateral rolling element is not easy to loosen, and can provide freedom of movement on a two-dimensional plane and achieve the effect of miniaturization.

The housing can provide a positive force to act on the translational stage and the lateral rolling element through the translational auxiliary element, wherein the direction of application of the positive force is perpendicular to the movement direction of the translational stage. In this way, the positive force enables the translatable stage and the lateral rolling element to be maintained on a translatable plane, stabilizing the moving direction.

The shell may include an opening part, a fixing part and a receiving part. The opening part surrounds the central axis and forms an opening. The fixing part extends from the opening part to the base and is fixed to the base. The receiving part is arranged between the opening part and the fixing part for receiving the translation auxiliary element. Thereby, the housing can improve the structural strength through the design of the receiving part and reduce the manufacturing tolerance of the housing. In addition, the fixing part of the housing can be connected and fixed to the base by glue or welding, but the present disclosure is not limited to this.

The receiving portion may include a second-level surface, wherein the second-level surfaces are parallel to each other and receive at least two translational auxiliary elements. Thereby, the shell structure can be a more complicated design, so that the force between the shell and the translation auxiliary element is more even. Specifically, the second-level surface can respectively correspond to two lateral rolling elements that roll along different dimensions.

The receiving part and the translation auxiliary element can be received in a point contact manner. Thereby, the friction between the housing and the translation auxiliary element is reduced, and the driving quality is improved.

The driving device may further include at least one groove, which is disposed in at least one of the translatable stage and the housing, wherein the translation auxiliary element is disposed in the groove. Thereby, it is possible to prevent the translational auxiliary element from strongly hitting the translational stage and the housing, and improve the reliability of the product.

The translation auxiliary element can be a sphere or a cylinder, but the present disclosure is not limited to this. When the translational auxiliary element is a sphere, it can be assembled easily and improve the assembly efficiency; when the translational auxiliary element is a cylinder, it can provide a stronger structural design and maintain the stability of the moving direction.

The translational auxiliary element can be symmetrically arranged along the central axis. This can reduce the occurrence of skew during assembly.

The driving device may further include a carrier disposed in the accommodating space. The carrier may include at least one axial rolling element, wherein the axial rolling element is used to move the carrier in a direction parallel to the central axis relative to the translatable stage. Thereby, the freedom of movement in the axial direction is provided, so that the overall driving device can achieve three-axis translation. In addition, the translatable stage may further include a first translatable stage and a second translatable stage. The lateral rolling element can be arranged between the first translatable stage and the second translatable stage, or between the base and the first translatable stage. The housing can be used to limit the movable range of the translatable stage (or the first and second translatable stages) and the carrier.

The shell and the axial rolling element can overlap at least partly along the direction parallel to the central axis. Thereby, the casing can prevent the axial rolling element from falling off, and the control carrier can keep moving within a specific range.

Specifically, the axial rolling element can be closer to the central axis than the translation auxiliary element. In this way, the compactness of the structure is improved, and the imbalance of the force applied during the axial movement can be avoided.

The housing can be composed of at least one of a plastic material and a metal material. Thereby, a housing with high structural strength and high dimensional accuracy is provided, and the production efficiency is high. In detail, the shell can be a plastic shell made by injection molding; or it can be a plastic shell with metal parts embedded in it, made by embedding it out; it can also be a metal shell made by metal stamping. become.

The shell may further include at least two injection marks, which are used to improve the molding efficiency , And reduce molding tolerances.

The driving device may further include at least one driving magnet and at least one driving coil. The driving magnet is arranged on one of the carrier and the translatable stage, and the driving coil is fixed to the housing and corresponding to the driving magnet. In this way, electromagnetic driving force can be provided to achieve the effects of optical image stabilization and auto focus. Specifically, the number of driving magnets can be two, which are respectively arranged on the carrier and the translatable stage. The driving coil may include two transverse driving coils and at least one axial driving coil, wherein the two transverse driving coils respectively correspond to the two driving magnets. Thereby, the translatable stage can be driven to move in a direction perpendicular to the central axis. The axial drive coil is fixed to the housing and corresponds to the two drive magnets provided on the carrier. Thereby, the carrier can be driven to move along the direction of the central axis.

The above-mentioned technical features of the driving device of the present disclosure can be combined and configured to achieve corresponding effects.

The present disclosure also provides a camera module, which includes the aforementioned driving device, an imaging lens group, and an electronic photosensitive element. The imaging lens group is arranged on the driving device, and the driving device is used for moving the imaging lens group in a direction perpendicular to the central axis and a direction parallel to the central axis. The electronic photosensitive element is used to convert a light passing through the imaging lens group into an image signal. This helps to achieve miniaturization.

The present disclosure further provides an electronic device including at least one of the aforementioned camera module. In this way, it is beneficial to provide a miniaturized electronic device.

The present disclosure further provides a camera module, which includes a housing, a base, an imaging lens, and at least one lateral rolling element. The shell is fixed to the base and forms an accommodating space. The imaging lens has an optical axis and is arranged in the accommodating space. The lateral rolling element is arranged between the imaging lens and the base, and is used for moving the imaging lens relative to the housing and the base along at least one direction perpendicular to the optical axis. The housing provides a positive force to act on the lateral rolling element, and the direction of the positive force is parallel to the optical axis of the imaging lens. The design of the housing provides the effect of pre-compression of the horizontal rolling element, which makes the horizontal rolling element not easy to loosen, stabilizes the moving direction of the imaging lens, and achieves the effect of miniaturization.

Based on the foregoing disclosure, specific embodiments are presented below and described in detail in conjunction with the drawings. <The first embodiment>

Please refer to FIG. 1A, which shows an exploded view of the camera module 10 according to the first embodiment of the present disclosure. It can be seen from FIG. 1A that the camera module 10 includes a driving device (not marked otherwise), an imaging lens 11, an electronic photosensitive element 12, a driving circuit board 13, a substrate 14 and a circuit board 15, in which the imaging lens 11 The drive circuit board 13, the substrate 14, and the circuit board 15 are arranged in order from the top to the bottom and are arranged in the drive device. The electronic photosensitive element 12 is arranged on the circuit board 15. The driving device has a central axis X, and includes a housing 110, a base 120, at least one translational stage (not marked otherwise), at least one translation auxiliary element 140, at least one groove 150, a carrier 160, and at least one drive Magnet (not marked separately) and at least one drive coil (not marked separately). The imaging lens 11 includes an imaging lens group 11a and a lens barrel 11b. The imaging lens group 11a is arranged in the lens barrel 11b, and the imaging lens 11 is arranged in an accommodation space (not labeled) formed by the housing 110 and the base 120. In detail, the driving device is used to enable the imaging lens group 11a to move in a direction perpendicular to the central axis X (that is, the optical axis of the imaging lens 11) and a direction parallel to the central axis X, and the electronic photosensitive element 12 is used to pass through the imaging lens The light of the group 11a is converted into an image signal.

Please refer to FIG. 1B together, which shows a combined perspective view of the imaging lens 11 and the driving device in the first embodiment of FIG. 1A. It can be seen from FIGS. 1A and 1B that the housing 110 surrounds the central axis X and is fixed to the base 120. The translatable loading platform is arranged in the accommodating space, wherein the translatable loading platform includes at least one lateral rolling element (not otherwise marked), and the lateral rolling element is used to make the translatable loading platform at least one perpendicular to the center relative to the housing 110 and the base 120 Move in the direction of axis X. The translational auxiliary element 140 abuts against the housing 110 and the translational stage, and the translational auxiliary element 140 and the lateral rolling element are respectively disposed on two sides of the translational stage along the central axis X opposite to each other. In this way, freedom of movement on a two-dimensional plane can be provided. Furthermore, the translation auxiliary element 140 can be symmetrically arranged along the central axis X to reduce skew during assembly. In detail, in the first embodiment, the translatable stage may include a first translatable stage 131 and a second translatable stage 132, and the lateral rolling element may include at least one first lateral rolling element 133a and at least one The second lateral rolling element 133b, wherein the number of the first lateral rolling element 133a is four and all of them are cylindrical, and are arranged between the base 120 and the first translatable stage 131, the number of the second lateral rolling element 133b is four They are all cylindrical and are arranged between the first translatable stage 131 and the second translatable stage 132, but the disclosure is not limited to this.

Furthermore, the housing 110 can be used to limit the range of movement of the first translatable stage 131 and the second translatable stage 132, and the design of the translation auxiliary element 140 and the housing 110 can provide the first translatable stage 131 and The second translatable stage 132 is moderately preloaded, so that the first translatable stage 131, the second translatable stage 132, the first lateral rolling element 133a and the second lateral rolling element 133b are not easily loosened, and miniaturization is achieved The effect of.

It can be seen from FIG. 1A that the carrier 160 is disposed in the accommodating space and the imaging lens 11 is mounted on the carrier 160. The carrier 160 includes at least one axial rolling element 161, wherein the axial rolling element 161 is used to move the carrier 160 in a direction parallel to the central axis X relative to the first translatable stage 131 and the second translatable stage 132. Thereby, the freedom of movement in the axial direction can be provided, so that the overall driving device can achieve three-axis translation. Furthermore, the housing 110 and the axial rolling element 161 may overlap at least partly along the direction parallel to the central axis X. Thereby, the housing 110 can prevent the axial rolling element 161 from falling off, and control the carrier 160 to keep moving within a specific range.

The driving magnet may be disposed on one of the carrier 160, the first translatable stage 131, and the second translatable stage 132, and the driving coil is fixed to the housing 110 and corresponds to the driving magnet. In this way, electromagnetic driving force can be provided, and the effects of optical image stabilization and auto focus can be achieved. Specifically, in the first embodiment, the driving magnet includes a first driving magnet 171 and a second driving magnet 172, wherein the number of the first driving magnet 171 and the second driving magnet 172 are two respectively and can be respectively arranged on the carrier 160 and a second translatable stage 132. The driving coil includes at least one first transverse driving coil 181 and at least one second transverse driving coil 182, the number of which is two respectively corresponding to the first driving magnet 171 and the second driving magnet 172, but the present disclosure is not limited to this . Thereby, the translatable stage can be driven to move in a direction perpendicular to the central axis X. The driving coil may further include at least one axial driving coil 183. The number of the axial driving coils 183 is two, which are fixed to the housing 110 and correspond to the two first driving magnets 171 provided on the carrier 160. Thereby, the carrier 160 can be driven to move along the direction of the central axis X.

In the first embodiment, the number of translational auxiliary elements 140 is eight and they are all cylinders, wherein four translational auxiliary elements 140 abut between the first translational stage 131 and the housing 110, and the other four translational auxiliary elements 140 abut Abutting between the second translatable stage 132 and the housing 110. In this way, a stronger structural design is provided and the stability of the moving direction is maintained. The housing 110 can be provided with a positive force on the first translatable stage 131, the second translatable stage 132, the first lateral rolling element 133a and the second lateral rolling element 133b by the translation auxiliary element 140. The force application direction is perpendicular to the moving directions of the first translational stage 131 and the second translational stage 132. Thereby, the positive force can keep the first translatable stage 131, the second translatable stage 132, the first lateral rolling element 133a, and the second lateral rolling element 133b on a translatable plane, thereby stabilizing the moving direction.

Furthermore, in the first embodiment, the number of axial rolling elements 161 is eight and all are spheres, wherein each of the two axial rolling elements 161 is disposed on the second translational stage 132 and corresponds to the position of the translational auxiliary element 140 , But this disclosure is not limited to this.

Furthermore, the groove 150 is disposed in at least one of the translatable stage and the housing 110, and the translation auxiliary element 140 is disposed in the groove 150. Specifically, the number of grooves 150 is sixteen, of which eight grooves 150 are provided on the first translatable stage 131, four grooves 150 are provided on the second translatable stage 132, and four grooves 150 are provided on the base 120 , And the first lateral rolling element 133a and the second lateral rolling element 133b are both disposed in the groove 150. In addition, the groove 150 can be provided in the housing 110 according to requirements, and the present disclosure is not limited to the first embodiment. Thereby, the translational auxiliary element 140, the first lateral rolling element 133a, and the second lateral rolling element 133b can be prevented from strongly hitting the first translatable stage 131, the second translatable stage 132, and the housing 110, and the product reliability is improved.

Please refer to Figure 1C, Figure 1D, and Figure 1E together. Figure 1C shows a perspective view of the housing 110 in the first embodiment in Figure 1A, and Figure 1D shows the housing 110 in the first embodiment in Figure 1A. FIG. 1E is another perspective view of the housing 110 in the first embodiment in FIG. 1A. It can be seen from Figures 1B to 1E that the housing 110 includes an opening portion 111, a fixing portion 112, and a receiving portion 113. The opening portion 111 surrounds the central axis X and forms an opening 111a, and the fixing portion 112 is opened by The hole portion 111 extends to the base 120 and is fixed to the base 120, and the receiving portion 113 is disposed between the opening portion 111 and the fixing portion 112 to receive the translation auxiliary element 140. In this way, the housing 110 can improve the structural strength through the design of the receiving portion 113 and reduce the manufacturing tolerance of the housing 110. Furthermore, the receiving portion 113 may include two-stage surfaces 113 a and 113 b, wherein the two-stage surfaces 113 a and 113 b are parallel to each other and receive at least two translational auxiliary elements 140. Thereby, the force between the housing 110 and the translation auxiliary element 140 can be made more even. In detail, the second-level surfaces 113a and 113b can respectively correspond to two lateral rolling elements that roll along different dimensions. The receiving portion 113 may receive the translation auxiliary element 140 in a point contact manner. Thereby, the friction between the housing 110 and the translation auxiliary element 140 can be reduced, and the driving quality can be improved. In addition, the fixing portion 112 of the housing 110 can be connected and fixed to the base 120 by glue or welding, but the present disclosure is not limited to this.

The housing 110 may further include at least two injection marks 114; specifically, in the first embodiment, the number of injection marks 114 is two, but the present disclosure is not limited thereto. Thereby, the molding efficiency of the shell is improved and the molding tolerance is reduced. Furthermore, the housing 110 may be composed of at least one of a plastic material and a metal material. In the first embodiment, the housing 110 is a plastic housing with a metal part M embedded in it, which is made by embedding it and then is fixed to the base 120 at a welding place F by welding and is electrically connected to the driving circuit board 13 In this way, the metal member M is used to transmit the driving current to the axial driving coil 183 arranged on the housing 110. Thereby, a housing with high structural strength and high dimensional accuracy is provided, and the production efficiency is high.

Please refer to FIG. 1F together, which shows a schematic diagram of the parameters of the camera module 10 in the first embodiment in FIG. 1A. It can be seen from FIG. 1A and FIG. 1F that the axial rolling element 161 can be closer to the central axis X than the translation auxiliary element 140. In this way, the compactness of the structure can be improved, and the imbalance of force applied during axial movement can be avoided. Specifically, the distance between the central axis X and the axial rolling element 161 is Da, and the distance between the central axis X and the translation assist element 140 is Db, and Da may be smaller than Db. In the first embodiment, Da is equal to 7.05 mm, and Db is equal to 8.86 mm and 9.39 mm. <Second embodiment>

Please refer to FIG. 2A, which shows an exploded view of the camera module 20 according to the second embodiment of the present disclosure. As shown in FIG. 2A, the camera module 20 includes a driving device (not marked otherwise), an imaging lens 21, an electronic photosensitive element 22, a driving circuit board 23, a substrate 24, and a circuit board 25, in which the imaging lens 21 The driving circuit board 23, the substrate 24, and the circuit board 25 are arranged in order from the top to the bottom, and the electronic photosensitive element 22 is arranged on the circuit board 25. The driving device has a central axis X, and includes a housing 210, a base 220, at least one translatable stage (not marked otherwise), at least one translation auxiliary element 240, at least one groove 250, a carrier 260, and at least one drive Magnet (not marked separately) and at least one drive coil (not marked separately). The imaging lens 21 includes an imaging lens group 21a and a lens barrel 21b. The imaging lens group 21a is arranged in the lens barrel 21b, and the imaging lens 21 is arranged in an accommodation space (not labeled) formed by the housing 210 and the base 220. In detail, the driving device is used to enable the imaging lens group 21a to move in a direction perpendicular to the central axis X (that is, the optical axis of the imaging lens 21) and a direction parallel to the central axis X, and the electronic photosensitive element 22 is used to pass through the imaging lens The light of the group 21a is converted into an image signal.

It can be seen from FIG. 2A that the housing 210 surrounds the central axis X and is fixed to the base 220. The translatable platform is arranged in the accommodating space, wherein the translatable platform includes at least one lateral rolling element (not otherwise marked), and the lateral rolling element is used to make the translatable platform relative to the housing 210 and the base 220 along at least one perpendicular to the center Move in the direction of axis X. The translational auxiliary element 240 abuts against the housing 210 and the translational stage, and the translational auxiliary element 240 and the lateral rolling element are respectively disposed on two sides of the translational stage along the central axis X opposite to each other. In this way, freedom of movement on a two-dimensional plane can be provided. Furthermore, the translation auxiliary element 240 can be symmetrically arranged along the central axis X to reduce skew during assembly. In detail, the translatable stage may include a first translatable stage 231 and a second translatable stage 232, and the lateral rolling elements may include at least one first lateral rolling element 233a and at least one second lateral rolling element 233b Where the number of the first lateral rolling elements 233a is four and all are cylinders, and are arranged between the base 220 and the first translatable stage 231, and the number of the second lateral rolling elements 233b is four and all are cylinders, And it is arranged between the first translatable stage 231 and the second translatable stage 232, but the content of the present disclosure is not limited to this.

Furthermore, the housing 210 can be used to limit the range of movement of the first translatable stage 231 and the second translatable stage 232, and the design of the translational auxiliary element 240 and the housing 210 can provide the first translatable stage 231 and The second translatable stage 232 is moderately preloaded, so that the first translatable stage 231, the second translatable stage 232, the first lateral rolling element 233a, and the second lateral rolling element 233b are not easily loosened, and miniaturization is achieved The effect of.

It can be seen from FIG. 2A that the carrier 260 is disposed in the accommodating space and the imaging lens 21 is mounted on the carrier 260. The carrier 260 includes at least one axial rolling element 261, wherein the axial rolling element 261 is used to move the carrier 260 in a direction parallel to the central axis X relative to the first translatable stage 231 and the second translatable stage 232. Thereby, the freedom of movement in the axial direction can be provided, so that the overall driving device can achieve three-axis translation. Furthermore, the housing 210 and the axial rolling element 261 may overlap at least partly along the direction parallel to the central axis X. Thereby, the housing 210 can prevent the axial rolling element 261 from falling off, and control the carrier 260 to keep moving within a specific range.

The driving magnet may be disposed on one of the carrier 260, the first translatable stage 231, and the second translatable stage 232, and the driving coil is fixed to the housing 210 and corresponding to the driving magnet. In this way, electromagnetic driving force can be provided, and the effects of optical image stabilization and auto focus can be achieved. Specifically, the driving magnet includes a first driving magnet 271 and a second driving magnet 272, wherein the number of the first driving magnet 271 and the second driving magnet 272 are two respectively and can be respectively disposed on the carrier 260 and the second movable magnet The carrier 232, the driving coils include at least one first transverse driving coil 281 and at least one second transverse driving coil 282, the number of which is two respectively corresponding to the first driving magnet 271 and the second driving magnet 272, but this disclosure does not Limited by this. Thereby, the translatable stage can be driven to move in a direction perpendicular to the central axis X. The driving coil may further include at least one axial driving coil 283. The number of the axial driving coils 283 is two and fixed to the housing 210 corresponding to the two first driving magnets 271 provided on the carrier 260. Thereby, the carrier 260 can be driven along the central axis Move in the X direction.

In the second embodiment, the number of translational auxiliary elements 240 is eight and all are spheres, of which four translational auxiliary elements 240 abut between the first translatable stage 231 and the housing 210, and the other four translational auxiliary elements 240 abut against Between the second translatable stage 232 and the housing 210. Thereby, assembly is facilitated, and the assembly efficiency is improved. The housing 210 can provide a positive force on the first translatable stage 231, the second translatable stage 232, the first lateral rolling element 233a and the second lateral rolling element 233b by the translational auxiliary element 240. The force application direction is perpendicular to the moving directions of the first translational stage 231 and the second translational stage 232. In this way, the positive force can keep the first translatable stage 231, the second translatable stage 232, the first lateral rolling element 233a, and the second lateral rolling element 233b on a translatable plane, thereby stabilizing the moving direction.

Furthermore, in the second embodiment, the number of axial rolling elements 261 is four and all are cylinders, wherein each axial rolling element 261 is disposed on the second translational stage 232 and corresponds to each two translational auxiliary elements 240 , But the content of this disclosure is not limited to this.

Furthermore, the groove 250 is disposed in at least one of the translatable stage and the housing 210, and the translation auxiliary element 240 is disposed in the groove 250. Specifically, the number of grooves 250 is sixteen, of which eight grooves 250 are provided on the first translatable carrier 231, four grooves 250 are provided on the second translatable carrier 232, and four grooves 250 are provided on the base 220 , And the first lateral rolling element 233a and the second lateral rolling element 233b are both disposed in the groove 250. In addition, the groove 250 can be provided in the housing 210 according to requirements. The present disclosure does not refer to the second The embodiment is limited. Thereby, the translational auxiliary element 240, the first lateral rolling element 233a and the second lateral rolling element 233b can be prevented from strongly hitting the first translatable stage 231, the second translatable stage 232, and the housing 210, and the product reliability is improved.

Please refer to FIGS. 2B and 2C together. FIG. 2B is a perspective view of the housing 210 in the second embodiment in FIG. 2A, and FIG. 2C is another perspective view of the housing 210 in the second embodiment in FIG. 2A. As can be seen from Figures 2B and 2C, the housing 210 includes an opening portion 211, a fixing portion 212, and a receiving portion 213. The opening portion 211 surrounds the central axis X and forms an opening 211a. The hole portion 211 extends to the base 220 and is fixed to the base 220, and the receiving portion 213 is disposed between the opening portion 211 and the fixing portion 212 for receiving the translation auxiliary element 240. In this way, the housing 210 can improve the structural strength through the design of the receiving portion 213 and reduce the manufacturing tolerance of the housing 210. Furthermore, the receiving portion 213 may further include two-stage surfaces 213a and 213b, wherein the two-stage surfaces 213a and 213b are parallel to each other and receive at least two translational auxiliary elements 240. Thereby, the force between the housing 210 and the translation auxiliary element 240 can be made more even. In detail, the second-level surfaces 213a and 213b can respectively correspond to two lateral rolling elements 233 that roll along different dimensions. The receiving portion 213 may receive the translation auxiliary element 240 in a point contact manner. Thereby, the friction between the housing 210 and the translation auxiliary element 240 can be reduced, and the driving quality can be improved. The fixing portion 212 of the housing 210 can be connected and fixed to the base 220 by glue or welding, but the present disclosure is not limited to this.

The housing 210 may further include at least two injection marks 214; specifically, in the second embodiment, the number of injection marks 214 is four. In this way, the molding efficiency is improved and the molding tolerance is reduced. Furthermore, the housing 210 may be composed of at least one of a plastic material and a metal material. In the second embodiment, the housing 210 is a plastic housing made by injection molding, and then fixed to the base 220 by glue. Thereby, a housing with high structural strength and high dimensional accuracy is provided, and the production efficiency is high.

Please also refer to FIG. 2D, which shows a schematic diagram of the parameters of the camera module 20 in the second embodiment in FIG. 2A. It can be seen from FIGS. 2A and 2D that the axial rolling element 261 can be closer to the central axis X than the translation auxiliary element 240. In this way, the compactness of the structure can be improved, and the imbalance of force applied during axial movement can be avoided. Specifically, the distance between the central axis X and the axial rolling element 261 is Da, and the distance between the central axis X and the translation assist element 240 is Db, and Da may be smaller than Db. In the second embodiment, Da is equal to 7.05 mm, and Db is equal to 8.86 mm and 9.39 mm. <The third embodiment>

Please refer to FIG. 3A, which shows an exploded view of the camera module 30 according to the third embodiment of the present disclosure. As shown in FIG. 3A, the camera module 30 includes a housing 310, a base 320, an imaging lens 31, at least one lateral rolling element (not marked otherwise), an electronic photosensitive element 32, a driving circuit board 33, and a substrate 34 And a circuit board 35, wherein the driving circuit board 33, the substrate 34, and the circuit board 35 are arranged in order from the top to the bottom, and the electronic photosensitive element 32 is arranged on the circuit board 35. The housing 310 is fixed to the base 320 and forms an accommodating space (not marked separately). The imaging lens 31 is disposed in the accommodating space and has an optical axis X1. The housing 310 has a central axis (that is, the optical axis X1 of the imaging lens 31). The imaging lens 31 includes an imaging lens group 31a and a carrier 360, wherein the imaging lens group 31a is disposed on the carrier 360, and the carrier 360 has the function of assembling a lens barrel; that is, the imaging lens 31 is an integrated imaging lens. The lateral rolling element is used to enable the imaging lens 31 to move in a direction at least perpendicular to the optical axis X1 relative to the housing 310 and the base 320, wherein the housing 310 provides a positive force acting on the lateral rolling element, and the direction of the positive force Parallel to the optical axis X1 of the imaging lens 31. The electronic photosensitive element 32 is used to convert the light passing through the imaging lens group 31a into an image signal.

It can be seen from FIG. 3A that the camera module 30 may further include at least one movable platform and at least one translation auxiliary element 340. The movable stage is arranged in the accommodating space. The translational auxiliary element 340 abuts against the housing 310 and the translational stage, and the translational auxiliary element 340 and the lateral rolling element are respectively disposed on two sides of the translational stage along the central axis opposite to each other. In this way, freedom of movement on a two-dimensional plane can be provided. Furthermore, the translational auxiliary element 340 can be symmetrically arranged along the central axis to reduce skew during assembly. In detail, the translatable stage may include a first translatable stage 331 and a second translatable stage 332. The lateral rolling element may include at least one first lateral rolling element 333a and at least one second lateral rolling element 333b, wherein the number of the first lateral rolling element 333a is two and all are cylinders, and are disposed on the base 320 and the first translatable Between the stages 331, the number of the second lateral rolling elements 333b is two and both are cylinders, and are arranged between the first translatable stage 331 and the second translatable stage 332, but this disclosure is not based on this Is limited.

Furthermore, the housing 310 can be used to limit the range of movement of the first translational stage 331 and the second translational stage 332, and the design of the translational auxiliary element 340 and the housing 310 can provide the first translational stage 331 and The second translatable stage 332 is moderately preloaded, so that the first translatable stage 331, the second translatable stage 332, the first lateral rolling element 333a and the second lateral rolling element 333b are not easily loosened, and miniaturization is achieved The effect of.

As can be seen from Figure 3A, the carrier 360 includes at least one axial rolling element 361, wherein the axial rolling element 361 is used to make the carrier 360 relative to the first translatable stage 331 and the second translatable stage 332 along the parallel central axis Move in direction. In this way, the freedom of movement in the axial direction can be provided, so that the entire camera module 30 can achieve three-axis translation during the auto-focusing process. Furthermore, the housing 310 and the axial rolling element 361 may overlap at least partly along the direction parallel to the central axis. Thereby, the housing 310 can prevent the axial rolling element 361 from falling off, and control the carrier 360 to keep moving within a specific range.

The camera module 30 may further include at least one first driving magnet 371, at least one second driving magnet 372, at least a first lateral driving coil 381, and at least one second lateral driving coil 382. Specifically, the number of the first driving magnet 371 and the second driving magnet 372 are two respectively, and they can be disposed on the carrier 360 and the second translatable stage 332, respectively. The number of the first transverse driving coil 381 and the second transverse driving coil 382 is two respectively corresponding to the first driving magnet 371 and the second driving magnet 372, but the content of the present disclosure is not limited thereto. The first translatable stage 331 and the second translatable stage 332 can be driven to move in a direction perpendicular to the central axis through the first lateral drive coil 381 and the second lateral drive coil 382. In this way, electromagnetic driving force can be provided, and the effects of optical image stabilization and auto focus can be achieved.

The camera module 30 may further include at least one axial drive coil 383. The axial drive coil 383 is fixed to the housing 310 and corresponds to the first drive magnet 371 provided on the carrier 360. Thereby, the carrier 360 can be driven to move along the direction of the central axis.

In the third embodiment, the number of the translation assisting elements 340 is four and all are spheres, wherein the translation assisting element 340 is disposed on the second translatable stage 332, and the four translation assisting elements 340 are all pressed against the housing 310. Thereby, assembly is facilitated, and the assembly efficiency is improved. The housing 310 can be provided with a positive force acting on the first translatable stage 331, the second translatable stage 332, the first lateral rolling element 333a, and the second lateral rolling element 333b by the translation auxiliary element 340. The force application direction is perpendicular to the moving directions of the first translational stage 331 and the second translational stage 332. Thereby, the positive force can keep the first translatable stage 331, the second translatable stage 332, the first lateral rolling element 333a, and the second lateral rolling element 333b on a translatable plane, thereby stabilizing the moving direction.

Furthermore, in the third embodiment, the number of the axial rolling elements 361 is eight and all are spheres, wherein each of the two axial rolling elements 361 is disposed on the second translational stage 332 and corresponds to the translational auxiliary element 340 Location , But this disclosure is not limited to this.

Furthermore, the camera module 30 may further include at least one groove 350 disposed in at least one of the translatable stage and the housing 310, and the translation auxiliary element 340 is disposed in the groove 350. Specifically, in the third embodiment, the number of grooves 350 is eight, of which two grooves 350 are provided on the first translatable stage 331, four grooves 350 are provided on the second translatable stage 332, and the two grooves 350 is disposed on the base 320, and the first lateral rolling element 333a and the second lateral rolling element 333b are both disposed in the groove 350. In addition, the groove 350 can be provided in the housing 310 according to requirements, and the present disclosure is not limited to the third embodiment. Thereby, the translational auxiliary element 340, the first lateral rolling element 333a and the second lateral rolling element 333b can be prevented from strongly hitting the first translatable stage 331, the second translatable stage 332 and the housing 310, and the product reliability is improved.

Please refer to FIGS. 3B and 3C together. FIG. 3B is a perspective view of the housing 310 in the third embodiment in FIG. 3A, and FIG. 3C is another perspective view of the housing 310 in the third embodiment in FIG. 3A. As can be seen from Figures 3A, 3B, and 3C, the housing 310 includes an opening portion 311, a fixing portion 312, and a receiving portion 313. The opening portion 311 surrounds the central axis and forms an opening 311a. The fixing portion 312 extends from the opening portion 311 to the base 320 and is fixed to the base 320, and the receiving portion 313 is disposed between the opening portion 311 and the fixing portion 312 for receiving the translation auxiliary element 340. In this way, the housing 310 can improve the structural strength through the design of the receiving portion 313 and reduce the manufacturing tolerance of the housing 310. Furthermore, the receiving portion 313 receives at least one translation auxiliary element 340. In this way, the force between the housing 310 and the translation auxiliary element 340 can be made more even. In detail, the receiving portion 313 may receive the translation auxiliary element 340 in a point contact manner. Thereby, the friction between the housing 310 and the translation auxiliary element 340 can be reduced, and the driving quality can be improved.

The housing 310 may further include at least two injection marks 314; specifically, in the third embodiment, the number of injection marks 314 is two, but the present disclosure is not limited thereto. Thereby, the molding efficiency of the shell is improved and the molding tolerance is reduced. In detail, the fixing portion 312 of the housing 310 can be glued or welded It is connected and fixed to the base 320 in a manner, but the content of the present disclosure is not limited to this. Furthermore, the housing 310 may be composed of at least one of a plastic material and a metal material. In the third embodiment, the shell 310 is a metal shell, which is formed by metal stamping and is then fixed to the base 320 by glue. Thereby, a housing with high structural strength and high dimensional accuracy is provided, and the production efficiency is high.

Please refer to FIG. 3D, which shows a schematic diagram of the parameters of the camera module 30 in the third embodiment in FIG. 3A. It can be seen from FIGS. 3A and 3D that the axial rolling element 361 can be closer to the central axis (that is, the optical axis X1 of the imaging lens 31) than the translation auxiliary element 340. In this way, the compactness of the structure can be improved, and the imbalance of force applied during axial movement can be avoided. Specifically, the distance between the central axis and the axial rolling element 361 is Da, and the distance between the central axis and the translation auxiliary element 340 is Db, and Da may be smaller than Db. In the third embodiment, Da is equal to 7.05 mm, and Db is equal to 8.86 mm.

<Fourth Embodiment>

FIG. 4A is a schematic diagram of the electronic device 40 according to the fourth embodiment of the present disclosure, and FIG. 4B is a block diagram of the electronic device 40 according to the fourth embodiment of FIG. 4A. As shown in FIGS. 4A and 4B, the electronic device 40 is a smart phone and includes a camera module 41, where the camera module 41 includes an imaging lens 41a and an electronic photosensitive element 41b. The camera module 41 of the fourth embodiment is disposed in the area on the side of the user interface 42, and the electronic photosensitive element 41b is disposed on the imaging surface (not shown in the figure) of the imaging lens 41a. The user interface 42 can be a touch screen or The display screen is not limited to this. The camera module 41 can be any one of the aforementioned first embodiment to the third embodiment, but the present disclosure is not limited to this.

Furthermore, the user enters the shooting mode through the user interface 42 of the electronic device 40. At this time, the imaging lens 41a collects the imaging light on the electronic photosensitive element 41b, and outputs electronic signals related to the image to an image signal processor (ISP) 43.

In accordance with the camera specifications of the electronic device 40, the electronic device 40 may further include an optical anti-shake component 44, which may be an OIS anti-shake feedback device. Further, the electronic device 40 may further include at least one auxiliary optical element (not labeled) And at least one sensing element 45. In the fourth embodiment, the auxiliary optical elements are a flash module 46 and a focus auxiliary module 47. The flash module 46 can be used to compensate for color temperature, and the focus auxiliary module 47 can be an infrared distance measuring element, a laser focus module, or the like. The sensing element 45 may have the function of sensing physical momentum and actuation energy, such as accelerometer, gyroscope, Hall Effect Element, to sense the shaking and shaking of the user's hand or the external environment, and then It is conducive to the automatic focusing function and the optical anti-shake component 44 of the camera module 41 in the electronic device 40 to obtain good imaging quality, and it is helpful for the electronic device 40 according to the present disclosure to have multiple modes of shooting functions. Such as optimized Selfie, low-light HDR (High Dynamic Range, high dynamic range imaging), high-resolution 4K (4K Resolution) recording, etc. In addition, the user can directly see the shooting screen of the camera on the touch screen, and manually operate the viewfinder on the touch screen to achieve the WYSIWYG autofocus function.

In addition, the electronic device 40 may further include, but is not limited to, a display unit (Display), a control unit (Control Unit), a storage unit (Storage Unit), a temporary storage unit (RAM), a read-only storage unit (ROM), or a combination thereof.

FIG. 4C is a schematic diagram of a self-portrait scene in the fourth embodiment according to FIG. 4A, and FIG. 4D is a schematic diagram of an image taken in the fourth embodiment according to FIG. 4A. From Fig. 4A to Fig. 4D, it can be seen that the camera module 41 and the user interface 42 are both facing the user. During selfie or live streaming, the camera module 41 and the user interface 42 can be simultaneously viewed and operated on the interface. After shooting, you can get an image as shown in Figure 4D. In this way, the camera module 41 with the content of the present disclosure can provide a better shooting experience.

Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure. Anyone with ordinary knowledge in the technical field can make some changes and changes without departing from the spirit and scope of the present disclosure. Retouching, therefore, the scope of protection of this disclosure shall be subject to the scope of the attached patent application.

10, 20, 30, 41: camera module 11, 21, 31, 41a: imaging lens 11a, 21a, 31a: imaging lens group 11b, 21b: lens barrel 12, 22, 32, 41b: electronic photosensitive element 13, 23, 33: drive circuit board 14, 24, 34: substrate 15, 25, 35: circuit board 110, 210, 310: shell 111, 211, 311: cut-out part 111a, 211a, 311a: opening 112, 212, 312: fixed part 113,213,313: Acceptance Department 113a, 113b, 213a, 213b: terrace 114,214,314: injection mark 120, 220, 320: base 131,231,331: The first translation stage 132,232,332: The second translation stage 133a, 233a, 333a: the first lateral rolling element 133b, 233b, 333b: second lateral rolling element 140, 240, 340: translation aids 150, 250, 350: groove 160, 260, 360: carrier 161,261,361: Axial rolling elements 171,271,371: the first driving magnet 172,272,372: second drive magnet 181,281,381: first transverse drive coil 182, 282, 382: second transverse drive coil 183,283,383: Axial drive coil 40: electronic device 42: User Interface 43: imaging signal processing components 44: Optical anti-shake component 45: sensing element 46: flash module 47: Focus assist module M: Metal parts F: Welding place X: central axis X1: Optical axis Da: The distance between the central axis and the axial rolling element Db: The distance between the central axis and the translation auxiliary element

FIG. 1A shows an exploded view of the camera module according to the first embodiment of the present disclosure; FIG. 1B is a combined perspective view of the imaging lens and the driving device in the first embodiment of FIG. 1A; Figure 1C is a perspective view of the housing in the first embodiment of Figure 1A; Figure 1D is a perspective view of the housing in the first embodiment of Figure 1A; Figure 1E shows another perspective view of the housing in the first embodiment of Figure 1A; FIG. 1F is a schematic diagram showing the parameters of the camera module in the first embodiment in FIG. 1A; FIG. 2A is an exploded view of the camera module according to the second embodiment of the present disclosure; Figure 2B is a perspective view of the housing in the second embodiment of Figure 2A; Figure 2C shows another perspective view of the housing in the second embodiment of Figure 2A; FIG. 2D is a schematic diagram showing the parameters of the camera module in the second embodiment in FIG. 2A; FIG. 3A shows an exploded view of the camera module according to the third embodiment of the present disclosure; Figure 3B shows a perspective view of the housing in the third embodiment of Figure 3A; Figure 3C shows another perspective view of the housing in the third embodiment of Figure 3A; FIG. 3D is a schematic diagram showing the parameters of the camera module in the third embodiment in FIG. 3A; 4A is a schematic diagram of an electronic device in a fourth embodiment according to the present disclosure; FIG. 4B shows a block diagram of the electronic device in the fourth embodiment according to FIG. 4A; Fig. 4C is a schematic diagram of the self-portrait scene in the fourth embodiment according to Fig. 4A ;as well as FIG. 4D is a schematic diagram of the image taken in the fourth embodiment according to FIG. 4A.

10: Camera module

11: imaging lens

11a: imaging lens group

11b: lens barrel

12: Electronic photosensitive element

13: drive circuit board

14: substrate

15: circuit board

110: shell

120: base

131: The first translatable stage

132: The second translatable stage

133a: The first horizontal rolling element

133b: second horizontal rolling element

140: translation aid

150: Groove

160: carrier

161: Axial rolling element

171: The first drive magnet

172: Second Drive Magnet

181: First transverse drive coil

182: second transverse drive coil

183: Axial drive coil

X: central axis

Claims (18)

A driving device having a central axis, the driving device comprising: A shell surrounding the central axis; A base, the shell is fixed to the base and forms an accommodating space; At least one translatable stage is disposed in the accommodating space, the at least one translatable stage includes at least one lateral rolling element, and the at least one lateral rolling element is used to make the at least one translatable stage relative to the housing and the The base moves along at least one direction perpendicular to the central axis; and At least one translation auxiliary element abuts against the housing and the at least one translation stage; Wherein, the at least one translational auxiliary element and the at least one lateral rolling element are respectively disposed on two sides of the at least one translational stage along the central axis. The driving device according to claim 1, wherein the housing provides a positive force acting on the at least one translatable stage and the at least one lateral rolling element through the at least one translation auxiliary element, and the positive force is applied The direction is perpendicular to a moving direction of the at least one translatable stage. The driving device according to claim 1, wherein the housing includes: An opening part surrounding the central axis and forming an opening; A fixing portion extending from the opening portion to the base and fixed to the base; and A receiving part is arranged between the opening part and the fixing part, and is used for receiving the at least one translation auxiliary element. The driving device according to claim 3, wherein the receiving portion includes a second-level surface, the second-level surfaces are parallel to each other and receive the at least two translational auxiliary elements. The driving device according to claim 3, wherein the receiving portion receives the at least one translation auxiliary element in a point contact manner. The driving device as described in claim 1, further comprising: At least one groove is disposed in at least one of the at least one translatable stage and the housing, and the at least one translation auxiliary element is disposed in the at least one groove. The driving device according to claim 1, wherein the at least one translation auxiliary element is a sphere. The driving device according to claim 1, wherein the at least one translation auxiliary element is a cylinder. The driving device according to claim 1, wherein the at least one translation auxiliary element is symmetrically arranged along the central axis. The driving device as described in claim 1, further comprising: A carrier disposed in the accommodating space, the carrier including at least one axial rolling element, wherein the at least one axial rolling element is used to move the carrier relative to the at least one translatable stage in a direction parallel to the central axis . The driving device according to claim 10, wherein the housing and the at least one axial rolling element overlap at least partially in a direction parallel to the central axis. The driving device according to claim 10, wherein the at least one axial rolling element is closer to the central axis than the at least one translation auxiliary element. The driving device according to claim 1, wherein the housing is composed of at least one of a plastic material and a metal material. The driving device according to claim 13, wherein the housing includes at least two injection marks. The driving device as described in claim 1, further comprising: At least one driving magnet is disposed on one of a carrier and the at least one translatable stage; and At least one drive coil is fixed to the housing and corresponds to the at least one drive magnet. A camera module, including: The driving device as described in claim 1; An imaging lens group disposed on the driving device, the driving device being used to move the imaging lens group in a direction perpendicular to the central axis and a direction parallel to the central axis; and An electronic photosensitive element is used to convert a light passing through the imaging lens group into an image signal. An electronic device including: At least one camera module as described in claim 16. A camera module, including: A shell A base, the shell is fixed to the base and forms an accommodating space; An imaging lens arranged in the accommodating space and having an optical axis; and At least one lateral rolling element, arranged between the imaging lens and the base, for moving the imaging lens relative to the housing and the base in at least one direction perpendicular to the optical axis; Wherein, the housing provides a positive force to act on the lateral rolling element, and the direction of application of the positive force is parallel to the optical axis of the imaging lens.

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